How do you win the defence mission without killing Scylla? I’ve never tried that. She is so fragile that usually dies in one turn as soon as she get’s attention of my squad. Her only defence is her armour. Once the armour is gone… well, let’s say she is a difficult (to miss) target.
If you overuse willpower skills then well you may have a problem with not killing her.
If you injure her enough, she runs away.
That’s good to know, maybe I’ll try that one day))